ALLPOWERS B1000 Expansion 1152Wh LiFePO4 battery for over 3,500 life cycles. AC high voltage input 0-100% full charge in 2 hours; Standalone power station with USB-C, 12V/10A car port and USB-A port. Compatible with R1500 for a maximum of 4,608Wh capacity. It can also be used with R2500 for expansion.